View at Official ubuntu advisory, NVD, CVE.org · CVE detail
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
CVE-2016-4657 medium priority: Ubuntu including 5 source packages (qtwebkit-opensource-src, qtwebkit-source, webkit, webkit2gtk, webkitgtk), 25 status rows across 5 suites (precise, trusty, upstream, xenial, yakkety): DNE 10, ignored 8, needs-triage 4, released 2, not-affected 1.
WebKit in Apple iOS before 9.3.5 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site.